package com.longge.mytest;

import java.io.IOException;

import org.junit.Test;

import com.alibaba.fastjson.JSONObject;

import com.fasterxml.jackson.core.JsonParseException;

import com.fasterxml.jackson.databind.JsonMappingException;

import com.fasterxml.jackson.databind.ObjectMapper;

import com.google.gson.Gson;

public class TestJson {

    @Test

    public void test() throws JsonParseException, JsonMappingException, IOException {

        String str = "{\"id\": 1,\"updateBy\": \"zhufen_朱芬\"}";

        // 使用fastjson，代码正常

        TestDto dto = JSONObject.parseObject(str, TestDto.class);

        System.out.println(dto.getId());

        // 使用jackson，会抛出异常，因为updateBy在java对象里没这个属性

        ObjectMapper mapper = new ObjectMapper();

        try {

            dto = mapper.readValue(str, TestDto.class);

            System.out.println(dto.getId());

        } catch (Exception e) {

            System.out.println(e.getMessage());

        }

        // 使用谷歌的gson，代码正常

        Gson gson = new Gson();

        try {

            dto = gson.fromJson(str, TestDto.class);

            System.out.println(dto.getId());

        } catch (Exception e) {

            System.out.println(e.getMessage());

        }

    }

    static class TestDto {

        private Integer id;

        private String test;

        public Integer getId() {

            return id;

        }

        public void setId(Integer id) {

            this.id = id;

        }

        public String getTest() {

            return test;

        }

        public void setTest(String test) {

            this.test = test;

        }

    }

}

1

Unrecognized field "updateBy" (class com.longge.mytest.TestJson$TestDto), not marked as ignorable (2 known properties: "test", "id"])

 at [Source: {"id": 1,"updateBy": "zhufen_朱芬"}; line: 1, column: 23] (through reference chain: com.longge.mytest.TestJson$TestDto["updateBy"])

1